On Wed, Nov 22, 2023 at 11:18:10PM +0100, deller@xxxxxxxxxx wrote: > From: Helge Deller <deller@xxxxxx> > My questions: > - Am I wrong with my analysis? This would typically of course depend on the arch, but whether it helps is what I would like to see with real numbers rather then speculation. Howeer, I don't expect some of these are hot paths except maybe the table lookups. So could you look at some perf stat differences without / with alignment ? Other than bootup live patching would be a good test case. We have selftest for modules, the script in selftests tools/testing/selftests/kmod/kmod.sh is pretty aggressive, but the live patching tests might be better suited. > - What does people see on other architectures? > - Does it make sense to add a compile- and runtime-check, like the patch below, to the kernel? The chatty aspects really depend on the above results. Aren't there some archs where an unaligned access would actually crash? Why hasn't that happened? Luis
